Re: [PATCH 0/2] scsi: handle reservation changes across migration

[Stefan Hajnoczi <stefanha@redhat.com>]

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On Wed, Apr 15, 2026 at 07:29:04PM -0400, Stefan Hajnoczi wrote:
> The SCSI Persistent Reservation code can fail if another node has interfered
> with the reservation (e.g. by sending a PERSISTENT RESERVE OUT command with a
> PREEMPT or CLEAR service action). This is rare but can happen if the
> application or clustering framework performs recovery and wants to take away
> the guest's reservation.
> 
> This patch series adds an extra step when loading device state that
> synchronizes the transferred vmstate against the actual reservation state of
> the disk before moving the reservation. This way we can gracefully handle
> changes to reservations that were performed externally.
> 
> Stefan Hajnoczi (2):
>   scsi: change buf_size to unsigned int in scsi_SG_IO()
>   scsi: handle reservation changes across migration
> 
>  include/hw/scsi/scsi.h |   3 +-
>  hw/scsi/scsi-generic.c | 175 +++++++++++++++++++++++++++++++++++------
>  2 files changed, 152 insertions(+), 26 deletions(-)

Ping.

Stefan

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